Technical Revision History - ABB RED615 Technical Manual

1YHT530004D05 D
4.5.4.10
4.5.5
4.5.5.1
4.5.5.2
4.5.5.3
615 series
Technical Manual
Characteristic
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Negative-sequence voltage before fault = 0.0 × U
nominal frequency injected from random phase angle, results based on statistical distribution of
1000 measurements
2) Includes the delay of the signal output contact

Technical revision history

Table 414: NSPTOV Technical revision history
Technical revision
B
Positive-sequence undervoltage protection PSPTUV
Identification
Function description
Positive-sequence undervoltage
protection
Function block
GUID-24EBDE8B-E1FE-47B0-878B-EBEC13A27CAC V1 EN
Figure 258: Function block
Functionality
The positive-sequence undervoltage protection PSPTUV is used to detect positive-
sequence undervoltage conditions. PSPTUV is used for the protection of small
power generation plants. The function helps in isolating an embedded plant from a
fault line when the fault current fed by the plant is too low to start an overcurrent
function but high enough to maintain the arc. Fast isolation of all the fault current
sources is necessary for a successful autoreclosure from the network-end circuit
breaker.
The function starts when the positive-sequence voltage drops below the set limit.
PSPTUV operates with the definite time (DT) characteristics.
Protection functions
Value
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f
, f = 50 Hz, negative-sequence overvoltage with
n n
Change
Internal change
IEC 61850 IEC 60617
identification identification
PSPTUV U1<
Section 4
, where n = 2, 3, 4, 5,...
n
ANSI/IEEE C37.2
device number
47U+
489